Patents by Inventor Anna Selvan John Appadurai

Anna Selvan John Appadurai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7993752
    Abstract: The photovoltaic structure comprises a thin film coating on a transparent substrate, the thin film comprising an effective amount of nanocrystalline silicon embedded in a matrix of amorphous and/or microcrystalline silicon. A transparent conducting oxide layer on a layer of non-conductive transparent oxide provides light-trapping capability as well as electrical conductivity where needed. A chemical vapor deposition (“CVD”) reactor provides improved gas distribution to the substrates being coated in the reactor. An improved sputtering process and an improved RF plasma-enhanced CVD manufacturing method both using high levels of hydrogen in the hydrogen-silane mixture and high electrical power levels for the plasma to increase the speed and to lower the cost of manufacturing.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: August 9, 2011
    Assignee: Nano PV Technologies, Inc.
    Inventor: Anna Selvan John Appadurai
  • Publication number: 20090229657
    Abstract: The photovoltaic structure comprises a thin film coating on a transparent substrate, the thin film comprising an effective amount of nanocrystalline silicon embedded in a matrix of amorphous and/or microcrystalline silicon. A transparent conducting oxide layer on a layer of non-conductive transparent oxide provides light-trapping capability as well as electrical conductivity where needed. A chemical vapor deposition (“CVD”) reactor provides improved gas distribution to the substrates being coated in the reactor. An improved sputtering process and an improved RF plasma-enhanced CVD manufacturing method both using high levels of hydrogen in the hydrogen-silane mixture and high electrical power levels for the plasma to increase the speed and to lower the cost of manufacturing.
    Type: Application
    Filed: March 17, 2008
    Publication date: September 17, 2009
    Inventor: Anna Selvan John Appadurai
  • Publication number: 20090233007
    Abstract: The photovoltaic structure comprises a thin film coating on a transparent substrate, the thin film comprising an effective amount of nanocrystalline silicon embedded in a matrix of amorphous and/or microcrystalline silicon. A transparent conducting oxide layer on a layer of non-conductive transparent oxide provides light-trapping capability as well as electrical conductivity where needed. A chemical vapor deposition (“CVD”) reactor provides improved gas distribution to the substrates being coated in the reactor. An improved sputtering process and an improved RF plasma-enhanced CVD manufacturing method both using high levels of hydrogen in the hydrogen-silane mixture and high electrical power levels for the plasma to increase the speed and to lower the cost of manufacturing.
    Type: Application
    Filed: March 17, 2008
    Publication date: September 17, 2009
    Inventor: Anna Selvan John Appadurai
  • Publication number: 20090229663
    Abstract: The photovoltaic structure comprises a thin film coating on a transparent substrate, the thin film comprising an effective amount of nanocrystalline silicon embedded in a matrix of amorphous and/or microcrystalline silicon. A transparent conducting oxide layer on a layer of non-conductive transparent oxide provides light-trapping capability as well as electrical conductivity where needed. A chemical vapor deposition (“CVD”) reactor provides improved gas distribution to the substrates being coated in the reactor. An improved sputtering process and an improved RF plasma-enhanced CVD manufacturing method both using high levels of hydrogen in the hydrogen-silane mixture and high electrical power levels for the plasma to increase the speed and to lower the cost of manufacturing.
    Type: Application
    Filed: March 17, 2008
    Publication date: September 17, 2009
    Inventor: Anna Selvan John Appadurai
  • Publication number: 20090229664
    Abstract: The photovoltaic structure comprises a thin film coating on a transparent substrate, the thin film comprising an effective amount of nanocrystalline silicon embedded in a matrix of amorphous and/or microcrystalline silicon. A transparent conducting oxide layer on a layer of non-conductive transparent oxide provides light-trapping capability as well as electrical conductivity where needed. A chemical vapor deposition (“CVD”) reactor provides improved gas distribution to the substrates being coated in the reactor. An improved sputtering process and an improved RF plasma-enhanced CVD manufacturing method both using high levels of hydrogen in the hydrogen-silane mixture and high electrical power levels for the plasma to increase the speed and to lower the cost of manufacturing.
    Type: Application
    Filed: March 17, 2008
    Publication date: September 17, 2009
    Inventor: Anna Selvan John Appadurai